HttpURLconnection使用post有参请求

秒速五厘米 2023-06-22 10:23 111阅读 0赞

1、在pom.xml中添加依赖包

<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>fastjson</artifactId>
    			<version>1.2.46</version>
    		</dependency>

2、创建测试类，模拟客户端请求（HttpURLconnectionTest4.java）

package com.jeff;
    
    import java.io.BufferedReader;
    import java.io.BufferedWriter;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStreamWriter;
    import java.io.UnsupportedEncodingException;
    import java.net.HttpURLConnection;
    import java.net.URL;
    
    import com.alibaba.fastjson.JSON;
    import com.jeff.entity.SysUser;
    
    public class HttpURLconnectionTest4 { 
    
    	public static void main(String[] args) { 
    
    		SysUser user = new SysUser();
    		user.setLoginName("zs123");
    		user.setPassword("123456");
    		user.setSalt("zs123456");
    		user.setStatus(1);
    		user.setName("张三123");
    		user.setCreateName("Jeff");
    		user.setModifyName("Jeff");
    
    		try { 
    			URL url = new URL("http://localhost:8080/add");
    			// 得到connection对象。
    			HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    			// 设置网络连接超时时间
    			connection.setConnectTimeout(3000);
    			// 设置请求方式
    			connection.setRequestMethod("POST");
    			// 允许写出
    			connection.setDoOutput(true);
    			// 允许读入
    			connection.setDoInput(true);
    			// 不使用缓存
    			connection.setUseCaches(false);
    			// 设置参数类型是json格式
    			connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
    			// 连接
    			connection.connect();
    			// 参数
    			String param = JSON.toJSONString(user);
    			BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream(), "UTF-8"));
    			writer.write(param);
    			writer.close();
    			// 得到响应码
    			int responseCode = connection.getResponseCode();
    			if (responseCode == HttpURLConnection.HTTP_OK) { 
    				// 得到响应流
    				InputStream inputStream = connection.getInputStream();
    				// 将响应流转换成字符串
    				String jsonStr = inputStreamToString(inputStream);
    				System.out.println(jsonStr);
    			}
    
    		} catch (Exception e) { 
    			e.printStackTrace();
    		}
    	}
    
    	/** * * @description: 将输入流转换成字符串 * @author: Jeff * @date: 2019年12月15日 * @param inputStream 输入流 * @return */
    	private static String inputStreamToString(InputStream inputStream) { 
    		StringBuffer buffer = new StringBuffer();
    		InputStreamReader inputStreamReader;
    		try { 
    			inputStreamReader = new InputStreamReader(inputStream, "utf-8");
    			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    			String str = null;
    			while ((str = bufferedReader.readLine()) != null) { 
    				buffer.append(str);
    			}
    			// 释放资源
    			bufferedReader.close();
    			inputStreamReader.close();
    			inputStream.close();
    		} catch (UnsupportedEncodingException e) { 
    			e.printStackTrace();
    		} catch (IOException e) { 
    			e.printStackTrace();
    		}
    		return buffer.toString();
    	}
    
    }

3、客户端的控制台输出结果  
![在这里插入图片描述][20191215232242946.png]  
![在这里插入图片描述][201912152327039.png]  
4、服务端的方法（客户端请求到此服务端方法）

/** * @description 新增用户 * @author Jeff * @date 2019/12/15 * @param request, response * @return java.lang.Object */
        @PostMapping("add")
        public Object add(HttpServletRequest request, HttpServletResponse response) throws IOException { 
            //接收请求参数
            InputStreamReader reader = new InputStreamReader(request.getInputStream());
            BufferedReader buffer = new BufferedReader(reader);
            String param = buffer.readLine();
            SysUser user = JSON.parseObject(param, SysUser.class);
            if (sysUserService.isExist(user)) { 
                return ResultsUtils.error(ResponseCodes.PARAMTER_ERROR, "登录名重复，请重新输入");
            }
            sysUserService.save(user);
            return ResultsUtils.success();
        }

5、服务端的控制台输出结果  
![在这里插入图片描述][20191215232522417.png]  
![在这里插入图片描述][20191215232749381.png]

[20191215232242946.png]: https://img-blog.csdnimg.cn/20191215232242946.png
[201912152327039.png]: https://img-blog.csdnimg.cn/201912152327039.png
[20191215232522417.png]: https://img-blog.csdnimg.cn/20191215232522417.png
[20191215232749381.png]: https://img-blog.csdnimg.cn/20191215232749381.png